package com.lhn.springcloud.controller;

import com.lhn.springcloud.pojo.Dept;
import com.lhn.springcloud.service.DeptService;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class DeptController {

    @Autowired
    private DeptService deptService;

    @Autowired
    private DiscoveryClient client;

    @PostMapping("/dept/add")
    public boolean addDept(Dept dept){
        return deptService.addDept(dept);
    }

    @GetMapping("/dept/get/{id}")
    @HystrixCommand( fallbackMethod = "HystrixGet" )
    public Dept get(@PathVariable("id") Long id){
        Dept dept = deptService.queryById(id);
        if (dept == null) {
            throw new RuntimeException("id => " + id + "，不存在该用户或信息无法被找到~");
        }
        return dept;
    }

    //备选方法
    public Dept HystrixGet(@PathVariable("id") Long id){
        return new Dept()
                .setDeptno(id)
                .setDname("id => " + id + "，不存在该用户或信息无法被找到~~@Hystrix")
                .setDb_source("no this data in databases");
    }


    @GetMapping("/dept/list")
    public List<Dept> queryAll(){
        return deptService.queryAll();
    }


    //注册进来的微服务，获取一些消息
    @GetMapping("/dept/discovery")
    public Object discovery(){
        //获取微服务列表清单
        List<String> services = client.getServices();
        System.out.println("discovery => services: "+services);

        //得到一个具体的微服务信息
        List<ServiceInstance> instances = client.getInstances("SPRINGCLOUD-PROVIDER-DEPT");
        for (ServiceInstance instance : instances) {
            System.out.println(instance.getHost() + "\t" +
                    instance.getPort() + "\t" +
                    instance.getUri()+ "\t" +
                    instance.getServiceId());
        }
        return this.client;
    }

}
